Projecting apparatus.



Patented Sept. 25, I900.

Sheet I.

3 Sheets- A TTORNE Y8 No. 658,607. Patented Sept. 25, I900.

F. J. ADAMS. PBOJECTING APPARATUS.

(Application fild Sept. 11, 1899.)

3 Sheets-Sheet 2.

(No Model.)

ATTORNEYS lJNiTED STATES PATENT OFFICE.

FRANK J. ADAMS, OF NEW YORK, N. Y., .ASSIGNOR TO THE NATURASCOPECOMPANY, OF SAME PLACE.

PROJECTlNG APPARATUS.

SPECIFICATION forming part of Letters Patent No. 658.607, datedSeptember 25, 1900.

Application filed September 11, 1899. Serial No. 730,154- (No model.)

To all whont it TIMI/y concern:

Be it known that I, FRANK J. ADAMS, of the city of New York, borough ofManhattan, county and State of New York, have invented a new andImproved Projecting Apparatus, of which the following is a full, clear,and eX- act description.

The object of the invention is to provide a new and improved projectingapparatus which is simple and durable in construction and arranged toproject the image of any desired object in its natural colors enlargedand perfect in its most minute detail on a wall, screen, or the like.

The invention consists of novel features and parts and combinations ofthe same, as will be fully described hereinafter and then pointed out inthe claims.

A practical embodiment of my invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a side elevation of the improvement. Fig. 2 is across-section of the same on the line 2 2 in Fig. 1. Fig. 3 is alongitudinal sectional elevation of the same. Fig. 4 is a front end viewof the same, showing the dissolving-slide and connected parts. Fig. 5 isa cross-section of the casing, showing the shutter arrangement whenusing the dissolving-slide. Fig. 6 is a reduced sectional plan view ofthe same. Fig. 7 is a rear end elevation of the improvement as arrangedfor dissolving views.

The apparatus illustrated in the drawings is provided with a casing A,preferably made cylindrical and mounted on legs A for supporting thecasing in a horizontal position on a table or other support. The casingA is provided at its front end with a cap B, on the inside of which arearranged a number of objective lenses 0 O of which the lens 0 is in themiddle of the cap and the lenses 0 O are on opposite sides thereof, asis plainly indicated in Fig. 2. On the inside of the easing and groupedaround the lenses (J C C are arranged a plurality of incandescentelectric lamps D and an arc-lamp E, preferably located at the top andmounted in a casing E, forming part of the casing A, a shield E being inthe front of the electrodes of the lamp to prevent escape of the rays oflight through the casing E into the room in which the apparatus islocated. The electric lamps D and E are connected by suitable wires witha source of electricity, so that the interior of the casing isilluminated when the lamps are lighted; but the rays of light emanatingfrom said lamps do not directly strike the lensesO C 0 through whichonly reflect-ed light passes to produce the image of the object held inthe rear end of the casing upon a screen, wall, or other device exteriorof the casing A.

The rear end of the casing A is closed by a cap F, in which is held aremovable end plate F, formed with a central aperture F to the wall ofwhich is secured a sleeve G, made of canvas or other flexible fabricmaterial, extending to the outside of the casing and permitting theoperator to pass with his hand the object through the sleeve into theinterior of the casing A, so that this object is illuminated by theelectric lamps D and E,

and the image of the object is thrown by the central lens C upon thescreen, it being understood that in this case the other lenses 0' C areclosed by suitable covers or are completely removed from the cap B. Theaperture F is arranged directly opposite the lens 0, and as the interiorof the casing A is preferably painted white it is evident that theobject held in the focal plane of the lens 0 is highly illuminated bythe lamps and the image of the object is thrown on the screen in naturalcolors and of immense proportions, so that most minute details of theobject will appear on the screen.

I prefer to use a plurality of incandescent lamps D and an arc-lamp E,as described and shown, for the reason that the object is highlyilluminated with a mellow light produced by the combination of the raysfrom the incandescent lamps and those from the arc-lamp.

For dissolving views a dissolving-slide H is employed, mounted tomovetransversely in bearings or guideways I, held on the front face ofthe cap B. This dissolving-slide H is so arranged that it at all timescovers the central lens 0, but alternately opens the lenses 0 0 For thispurpose the dissolving-slide H is provided on its outer face with a rackJ, (see Fig. 4,) in mesh with a pinion J, secured on the upper end of ashaft J mount ed to turn in suitable bearings held on the front face ofthe cap B. On the lower end of the shaft J is secured a bevel gear-wheelJ in mesh with a bevel gear-wheel J, fastened to the forward end of alongitudinally-extending shaft J journaled in suitable bearings attachedto the under side of the casing A. On the rear end of the shaft J isarranged a hand-wheel J under the control of the operator to turn theshaft J and thereby impart a rotary motion to the shaft J by thegear-wheels J and J lhe rotary motion of the shaft J causes a transversemovement of the dissolving-slide H by the action of .the pinion J on therack J, so that the slide H gradually uncovers the lens 0 or C andcovers the other lens 0 or O. For dissolving views the cap-plate F,previously referred to, is removed and replaced by a capplate F havingtwo apertures F F in exact alinement with the lenses 0 C The objects ofwhich images are to be thrown successively on the screen are displayedin the apertures F F to be illuminated by the rays of light from thelamps, and the apertures F F are adapted to be alternately opened andclosed by a shutter K, made semicircular in form and secured on avertically-disposed shaft K, journaled in suitable bearings on theinside of the cap-plate F The lower end of the shaft K extends throughthe cap F and ear ries atits outer end a bevel-pinion K in mesh with abevel gear-wheel K secured to the shaft J so that when the latter isturned a rotary motion is given by the gear-wheels K K to the shaft K toswing the shutter K from one opening to the other, so as to alter.-nately open and close the apertures F F in unison with the movement ofthe dissolvingslide I-I, alternately and gradually uncover.- ing andcovering the lenses C 0 In using the apparatus for dissolving views anobject is first placed in the aperture F the slide H is moved away fromthe lens 0, so that the image of this object is thrown on the screen,and then the operator places the other object into the opening F andturns the hand-wheel J so'that the dissolvingslide H is gradually movedtransversely to cover up the lens 0 and to uncover the lens 0 and at thesame time move the shutter K from the closed opening F over the openingF to close the latter, so that the image of y the object on the screengradually disappears and the image of the object in the opening Fgradually appears on the screen.

ject in the rear of the casing, it is necessary.

that the latter be made in sections, sliding one into the other orformed with bellows to allow the operator to make the desired adjustment.

In order to permit a ready exchange of the rear cap-plates for thedifferent purposes mentioned, I provide each cap-plate with a pluralityof wing-nuts F adapted to pass through slots in an annular flange F ofthe cap, the wing-nuts being then given a quarter-turn, as shown in Fig.7, for locking the plate in position on the flange.

It is expressly understood that the highlyilluminated object in the rearof the casing is refracted by the lenses, so as to appear greatlyenlarged and in natural colors on the screen, the lenses being protectedfrom the direct rays emanating from the lamps as the latter are groupedaround the casings of the lenses, as illustrated in the drawings.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patentl. A projecting apparatus, comprising a casing,a plurality of lenses in the front end of the casing, a plurality oflamps in the front end of said casing and grouped around the lenses insuch a manner as to prevent their rays of light from passing directly tothe lenses, a dissolving-slide movable over the lenses, and a shutter atthe rear end of the casing, for alternately opening and closing aplurality of openings in the rear end of the casing, substantially asshown and described.

2, A projecting apparatus, comprising a casing, a plurality of lenses inthe front end of the casing, a plurality of lamps in the front end ofsaid casing and grouped around the lenses in such a'manner as to.prevent their rays of light from passing directly to the lenses, adissolving-slide movable over the lenses, a shutter at the rear end ofthe casing, for alternately opening and closinga plurality of openingsin the rear end of the casing, and means for simultaneouslyactuating'the said dissolving-slide and said shutter, substantially asshown and described.

FRANK J. ADAMS.

Witnesses:

THEo. G. Hos'rER, JNo. M. BITTER.

